Techniques for benchmarking pairing strategies in a contact center system

ABSTRACT

Techniques for benchmarking pairing strategies in a contact center system are disclosed. In one particular embodiment, the techniques may be realized as a method for techniques for benchmarking pairing strategies in a contact center system comprising: cycling, by at least one processor, among at least two pairing strategies; and determining, by the at least one processor, a difference in performance between the at least two pairing strategies.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 15/131,915, filed Apr. 18, 2016, which is a continuation-in-part of U.S. patent application Ser. No. 12/021,251, filed Jan. 28, 2008, and which is a continuation-in-part of U.S. patent application Ser. No. 14/727,271, filed Jun. 1, 2015, which is a continuation of U.S. patent application Ser. No. 14/472,998, filed Aug. 29, 2014, now U.S. Pat. No. 9,215,323, which is a continuation of U.S. patent application Ser. No. 12/266,446, filed Nov. 6, 2008, now U.S. Pat. No. 8,824,658, each of which is hereby incorporated by reference in their entirety as if fully set forth herein.

FIELD OF THE DISCLOSURE

This disclosure generally relates to contact centers and, more particularly, to techniques for benchmarking pairing strategies in a contact center system.

BACKGROUND OF THE DISCLOSURE

A typical contact center algorithmically assigns contacts arriving at the contact center to agents available to handle those contacts. At times, the contact center may have agents available and waiting for assignment to inbound or outbound contacts (e.g., telephone calls, Internet chat sessions, email) or outbound contacts. At other times, the contact center may have contacts waiting in one or more queues for an agent to become available for assignment.

In some typical contact centers, contacts are assigned to agents ordered based on time of arrival, and agents receive contacts ordered based on the time when those agents became available. This strategy may be referred to as a “first-in, first-out”, “FIFO”, or “round-robin” strategy.

Some contact centers may use a “performance based routing” or “PBR” approach to ordering the queue of available agents or, occasionally, contacts. PBR ordering strategies attempt to maximize the expected outcome of each contact—agent interaction but do so typically without regard for utilizing agents in a contact center uniformly.

When a contact center changes from using one type of pairing strategy (e.g., FIFO) to another type of pairing strategy (e.g., PBR), overall contact center performance will continue to vary over time. It can be difficult to measure the amount of performance change attributable to using a new pairing strategy because there may be other factors that account for some of the increased or decreased performance over time.

In view of the foregoing, it may be understood that there is a need for a system that enables benchmarking of alternative routing strategies to measure changes in performance attributable to the alternative routing strategies.

SUMMARY OF THE DISCLOSURE

Techniques for benchmarking pairing strategies in a contact center system are disclosed. In one particular embodiment, the techniques may be realized as a method for techniques for benchmarking pairing strategies in a contact center system comprising: cycling, by at least one processor, among at least two pairing strategies; and determining, by the at least one processor, a difference in performance between the at least two pairing strategies.

In accordance with other aspects of this particular embodiment, the method may further comprise: determining, by the at least one processor, an arrival time of a contact; selecting, by the at least one processor, a first pairing strategy of the at least two pairing strategies based on the arrival time; and pairing, by the at least one processor, the contact to an agent using the first pairing strategy.

In accordance with other aspects of this particular embodiment, the method may further comprise associating, by the at least one processor, an identifier of the first pairing strategy with a record of an interaction between the contact and the agent.

In accordance with other aspects of this particular embodiment, the at least two pairing strategies may be allocated equal proportions of a cycle time period, a duration of a cycle through each of the at least two pairing strategies may be less than an hour, a duration of a cycle through each of the at least two pairing strategies may be less than a day, or a duration of a cycle through each of the at least two pairing strategies may be less than a week.

In accordance with other aspects of this particular embodiment, the method may further comprise: determining, by the at least one processor, a prior pairing of a contact; selecting, by the at least one processor, a first pairing strategy of the at least two pairing strategies based on the prior pairing; and pairing, by the at least one processor, the contact to an agent using the first pairing strategy.

In accordance with other aspects of this particular embodiment, a second pairing strategy of the at least two pairing strategies may have been selected based on an arrival time of the contact in an absence of the prior pairing.

In accordance with other aspects of this particular embodiment, the method may further comprise determining, by the at least one processor, a differential in value attributable to at least one pairing strategy of the at least two pairing strategies.

In accordance with other aspects of this particular embodiment, the method may further comprise determining, by the at least one processor, compensation to a provider of the at least one pairing strategy of the at least two pairing strategies based on the differential value.

In accordance with other aspects of this particular embodiment, the at least one pairing strategy of the at least two pairing strategies may comprise at least one of: a behavioral pairing (BP) strategy, a first-in, first-out (FIFO) pairing strategy, a performance-based routing (PBR) strategy, a highest-performing-agent pairing strategy, a highest-performing-agent-for-contact-type pairing strategy, a longest-available-agent pairing strategy, a least-occupied-agent pairing strategy, a randomly-selected-agent pairing strategy, a randomly-selected-contact pairing strategy, a fewest-contacts-taken-by-agent pairing strategy, a sequentially-labeled-agent pairing strategy, a longest-waiting-contact pairing strategy, or a highest-priority-contact pairing strategy.

In accordance with other aspects of this particular embodiment, a duration of a cycle through each of the at least two pairing strategies may align infrequently with changes to hours of a day.

In another particular embodiment, the techniques may be realized as a system for benchmarking pairing strategies in a contact center system comprising at least one processor, wherein the at least one processor is configured to perform the above-described method.

In another particular embodiment, the techniques may be realized as an article of manufacture for benchmarking pairing strategies in a contact center system comprising: a non-transitory processor readable medium; and instructions stored on the medium; wherein the instructions are configured to be readable from the medium by at least one processor and thereby cause the at least one processor to operate so as to perform the above-described method.

The present disclosure will now be described in more detail with reference to particular embodiments thereof as shown in the accompanying drawings. While the present disclosure is described below with reference to particular embodiments, it should be understood that the present disclosure is not limited thereto. Those of ordinary skill in the art having access to the teachings herein will recognize additional implementations, modifications, and embodiments, as well as other fields of use, which are within the scope of the present disclosure as described herein, and with respect to which the present disclosure may be of significant utility.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to facilitate a fuller understanding of the present disclosure, reference is now made to the accompanying drawings, in which like elements are referenced with like numerals. These drawings should not be construed as limiting the present disclosure, but are intended to be illustrative only.

FIG. 1A shows a schematic representation of a benchmarking sequence according to embodiments of the present disclosure.

FIG. 1B shows a schematic representation of benchmarking sequence according to embodiments of the present disclosure.

FIG. 2A shows a schematic representation of benchmarking sequence according to embodiments of the present disclosure.

FIG. 2B shows a schematic representation of benchmarking sequence according to embodiments of the present disclosure.

FIG. 3A shows a schematic representation of benchmarking sequence according to embodiments of the present disclosure.

FIG. 3B shows a schematic representation of benchmarking sequence according to embodiments of the present disclosure.

FIG. 3C shows a block diagram of a contact center system according to embodiments of the present disclosure.

FIG. 3D shows a block diagram of a behavioral pairing module according to embodiments of the present disclosure.

FIG. 4 shows a block diagram of a contact center according to embodiments of the present disclosure.

FIG. 5 shows a flow diagram of a benchmarking method according to embodiments of the present disclosure.

FIG. 6 depicts a block diagram of a benchmarking module according to embodiments of the present disclosure.

FIG. 7A shows a schematic representation of benchmarking sequence according to embodiments of the present disclosure.

FIG. 7B shows a schematic representation of benchmarking sequence according to embodiments of the present disclosure.

DETAILED DESCRIPTION

A typical contact center algorithmically assigns contacts arriving at the contact center to agents available to handle those contacts. At times, the contact center may have agents available and waiting for assignment to inbound or outbound contacts (e.g., telephone calls, Internet chat sessions, email) or outbound contacts. At other times, the contact center may have contacts waiting in one or more queues for an agent to become available for assignment.

In some typical contact centers, contacts are assigned to agents ordered based on time of arrival, and agents receive contacts ordered based on the time when those agents became available. This strategy may be referred to as a “first-in, first-out”, “FIFO”, or “round-robin” strategy. For example, a longest-available agent pairing strategy preferably selects the available agent who has been available for the longest time.

Some contact centers may use a “performance based routing” or “PBR” approach to ordering the queue of available agents or, occasionally, contacts. PBR ordering strategies attempt to maximize the expected outcome of each contact-agent interaction but do so typically without regard for utilizing agents in a contact center uniformly. Some variants of PBR may include a highest-performing-agent pairing strategy, preferably selecting the available agent with the highest performance, or a highest-performing-agent-for-contact-type pairing strategy, preferably selecting the available agent with the highest performance for the type of contact being paired.

For yet another example, some contact centers may use a “behavioral pairing” or “BP” strategy, under which contacts and agents may be deliberately (preferentially) paired in a fashion that enables the assignment of subsequent contact-agent pairs such that when the benefits of all the assignments under a BP strategy are totaled they may exceed those of FIFO and PBR strategies. BP is designed to encourage balanced utilization of agents within a skill queue while nevertheless simultaneously improving overall contact center performance beyond what FIFO or PBR methods will allow. This is a remarkable achievement inasmuch as BP acts on the same calls and same agents as FIFO or PBR methods, utilizes agents approximately evenly as FIFO provides, and yet improves overall contact center performance. BP is described in, e.g., U.S. patent application Ser. No. 14/871,658, filed Sep. 30, 2015, which is incorporated by reference herein. Additional information about these and other features regarding the pairing or matching modules (sometimes also referred to as “SATMAP”, “routing system”, “routing engine”, etc.) is described in, for example, U.S. Pat. No. 8,879,715, which is incorporated herein by reference.

Some contact centers may use a variety of other possible pairing strategies. For example, in a longest-available agent pairing strategy, an agent may be selected who has been waiting (idle) the longest time since the agent's most recent contact interaction (e.g., call) has ended. In a least-occupied agent pairing strategy, an agent may be selected who has the lowest ratio of contact interaction time to waiting or idle time (e.g., time spent on calls versus time spent off calls). In a fewest-contact-interactions-taken-by-agent pairing strategy, an agent may be selected who has the fewest total contact interactions or calls. In a randomly-selected-agent pairing strategy, an available agent may be selected at random (e.g., using a pseudorandom number generator). In a sequentially-labeled-agent pairing strategy, agents may be labeled sequentially, and the available agent with the next label in sequence may be selected.

In situations where multiple contacts are waiting in a queue, and an agent becomes available for connection to one of the contacts in the queue, a variety of pairing strategies may be used. For example, in a FIFO or longest-waiting-contact pairing strategy, the agent may be preferably paired with the contact that has been waiting in queue the longest (e.g., the contact at the head of the queue). In a randomly-selected-contact pairing strategy, the agent may be paired with a contact selected at random from among all or a subset of the contacts in the queue. In a priority-based routing or highest-priority-contact pairing strategy, the agent may be paired with a higher-priority contact even if a lower-priority contact has been waiting in the queue longer.

Contact centers may measure performance based on a variety of metrics. For example, a contact center may measure performance based on one or more of sales revenue, sales conversion rates, customer retention rates, average handle time, customer satisfaction (based on, e.g., customer surveys), etc. Regardless of what metric or combination of metrics a contact center uses to measure performance, or what pairing strategy (e.g., FIFO, PBR, BP) a contact center uses, performance may vary over time. For example, year-over-year contact center performance may vary as a company shrinks or grows over time or introduces new products or contact center campaigns. Month-to-month contact center performance may vary as a company goes through sales cycles, such as a busy holiday season selling period, or a heavy period of technical support requests following a new product or upgrade rollout. Day-to-day contact center performance may vary if, for example, customers are more likely to call during a weekend than on a weekday, or more likely to call on a Monday than a Friday. Intraday contact center performance may also vary. For example, customers may be more likely to call at when a contact center first opens (e.g., 8:00 AM), or during a lunch break (e.g., 12:00 PM), or in the evening after typical business hours (e.g., 6:00 PM), than at other times during the day. Intra-hour contact center performance may also vary. For example, more urgent, high-value contacts may be more likely to arrive the minute the contact center opens (e.g., 9:00 or 9:01) than even a little later (e.g., 9:05). Contact center performance may also vary depending on the number and caliber of agents working at a given time. For example, the 9:00-5:00 PM shift of agents may perform, on average, better than the 5:00-9:00 AM shift of agents.

These examples of of variability at certain times of day or over larger time periods can make it difficult to attribute changes in performance over a given time period to a particular pairing strategy. For example, if a contact center used FIFO routing for one year with an average performance of 20% sales conversion rate, then switched to PBR in the second year with an average performance of 30% sales conversion rate, the apparent change in performance is a 50% improvement. However, this contact center may not have a reliable way to know what the average performance in the second year would have been had it kept the contact center using FIFO routing instead of PBR. In real-world situations, at least some of the 50% gain in performance in the second year may be attributable to other factors or variables that were not controlled or measured. For example, the contact center may have retrained its agents or hired higher-performing agents, or the company may have introduced an improved product with better reception in the marketplace. Consequently, contact centers may struggle to analyze the internal rate of return or return on investment from switching to a different to a different pairing strategy due to challenges associated with measuring performance gain attributable to the new pairing strategy.

In some embodiments, a contact center may switch (or “cycle”) periodically among at least two different pairing strategies (e.g., between FIFO and PBR; between PBR and BP; among FIFO, PBR, and BP). Additionally, the outcome of each contact-agent interaction may be recorded along with an identification of which pairing strategy (e.g., FIFO, PBR, or BP) had been used to assign that particular contact-agent pair. By tracking which interactions produced which results, the contact center may measure the performance attributable to a first strategy (e.g., FIFO) and the performance attributable to a second strategy (e.g., PBR). In this way, the relative performance of one strategy may be benchmarked against the other. The contact center may, over many periods of switching between different pairing strategies, more reliably attribute performance gain to one strategy or the other.

Several benchmarking techniques may achieve precisely measurable performance gain by reducing noise from confounding variables and eliminating bias in favor of one pairing strategy or another. In some embodiments, benchmarking techniques may be time-based (“epoch benchmarking”). In other embodiments, benchmarking techniques may involve randomization or counting (“inline benchmarking”). In other embodiments, benchmarking techniques may be a hybrid of epoch and inline benchmarking.

In epoch benchmarking, as explained in detail below, the switching frequency (or period duration) can affect the accuracy and fairness (e.g., statistical purity) of the benchmark. For example, assume the period is two years, switching each year between two different strategies. In this case, the contact center may use FIFO in the first year at a 20% conversion rate and PBR in the second year at a 30% conversion rate, and measure the gain as 50%. However, this period is too large to eliminate or otherwise control for expected variability in performance. Even shorter periods such as two months, switching between strategies each month, may be susceptible to similar effects. For example, if FIFO is used in November, and PBR is used December, some performance improvement in December may be attributable to increased holiday sales in December rather than the PBR itself.

In some embodiments, to reduce or minimize the effects of performance variability over time, the period may be much shorter (e.g., less than a day, less than an hour, less than twenty minutes). FIG. 1A shows a benchmarking period of ten units (e.g., ten minutes). In FIG. 1A, the horizontal axis represents time, and the vertical axis represents whether a first pairing strategy (“1”) or a second pairing strategy (“0”) is used. For the first five minutes (e.g., 9:00-9:05 AM), the first pairing strategy (e.g., BP) may be used. After five minutes, the contact center may switch to the second pairing strategy (e.g., FIFO or PBR) for the remaining five minutes of the ten-minute period (9:05-9:10 AM). At 9:10 AM, the second period may begin, switching back to the first pairing strategy (not shown in FIG. 1A). If the period is 30 minutes (i.e., each unit of time in FIG. 1A is equal to three minutes), the first pairing strategy may be used for the first 15 minutes, and the second pairing strategy may be used for the second 15 minutes.

With short, intra-hour periods (10 minutes, 20 minutes, 30 minutes, etc.), the benchmark is less likely to be biased in favor of one pairing strategy or another based on long-term variability (e.g., year-over-year growth, month-to-month sales cycles). However, other factors of performance variability may persist. For example, if the contact center always applies the period shown in FIG. 1A when it opens in the morning, the contact center will always use the first strategy (BP) for the first five minutes. As explained above, the contacts who arrive at a contact center the moment it opens may be of a different type, urgency, value, or distribution of type/urgency/value than the contacts that arrive at other times of the hour or the day. Consequently, the benchmark may be biased in favor of the pairing strategy used at the beginning of the day (e.g., 9:00 AM) each day.

In some embodiments, to reduce or minimize the effects of performance variability over even short periods of time, the order in which pairing strategies are used within each period may change. For example, as shown in FIG. 1B, the order in which pairing strategies are used has been reversed from the order shown in FIG. 1A. Specifically, the contact center may start with the second pairing strategy (e.g., FIFO or PBR) for the first five minutes, then switch to the first pairing strategy (BP) for the following five minutes.

In some embodiments, to help ensure trust and fairness in the benchmarking system, the benchmarking schedule may be established and published or otherwise shared with contact center management ahead or other users of time. In some embodiments, contact center management or other users may be given direct, real-time control over the benchmarking schedule, such as using a computer program interface to control the cycle duration and the ordering of pairing strategies.

Embodiments of the present disclosure may use any of a variety of techniques for varying the order in which the pairing strategies are used within each period. For example, the contact center may alternate each hour (or each day or each month) between starting with the first ordering shown in FIG. 1A and starting with the second ordering shown in FIG. 1B. In other embodiments, each period may randomly select an ordering (e.g., approximately 50% of the periods in a given day used the ordering shown in FIG. 1A, and approximately 50% of the periods in a given day use the ordering shown in FIG. 1B, with a uniform and random distribution of orderings among the periods).

In the examples of FIGS. 1A and 1B, each pairing strategy is used for the same amount of time within each period (e.g., five minutes each). In these examples, the “duty cycle” is 50%. However, notwithstanding other variables affecting performance, some pairing strategies are expected to perform better than others. For example, BP is expected to perform better than FIFO. Consequently, a contact center may wish to use BP for a greater proportion of time than FIFO—so that more pairings are made using the higher-performing pairing strategy. Thus, the contact center may prefer a higher duty cycle (e.g., 60%, 70%, 80%, 90%, etc.) representing more time (or proportion of contacts) paired using the higher-performing pairing strategy. FIG. 2A shows an example of a ten-minute period with an 80% duty cycle. For the first eight minutes (e.g., 9:00-9:08 AM), the first pairing strategy (e.g., BP) may be used. After the first eight minutes, the contact center may switch to the second pairing strategy (e.g., FIFO) for the remaining two minutes of the period (9:08-9:10) before switching back to the first pairing strategy again (not shown). If, for another example, a thirty-minute period is used, the first pairing strategy may be used for the first twenty-four minutes (e.g., 9:00-9:24 AM), and the second pairing strategy may be used for the next six minutes (e.g., 9:24-9:30 AM).

As shown in FIG. 2B, the contact center may proceed through six ten-minute periods over the course of an hour. In this example, each ten-minute period has an 80% duty cycle favoring the first pairing strategy, and the ordering within each period starts with the favored first pairing strategy. Over the hour, the contact center may switch pairing strategies twelve times (e.g., at 9:08, 9:10, 9:18, 9:20, 9:28, 9:30, 9:38, 9:40, 9:48, 9:50, 9:58, and 10:00). Within the hour, the first pairing strategy was used a total of 80% of the time (48 minutes), and the second pairing strategy was used the other 20% of the time (12 minutes). For a thirty-minute period with an 80% duty cycle (not shown), over the hour, the contact center may switch pairing strategies four times (e.g., at 9:24, 9:30, 9:48, and 10:00), and the total remains 48 minutes using the first pairing strategy and 12 minute using the second pairing strategy.

In some embodiments, as in the example of FIG. 1B, the order in which the pairing strategies are used within a period may change (not shown), even as the duty cycle (percentage of time within the period that a given strategy is used) remains the same. Nevertheless, for periods which are factors or multiples of 60 minutes (e.g., 10 minutes, 30 minutes), periods may always or frequently align to boundaries at the top of each hour (e.g., new periods begin at 9:00, 10:00, 11:00, etc.), regardless of the ordering of pairing strategies to be used for the period at the beginning of a given hour.

In some embodiments, as explained below with references to FIGS. 3A-D, choosing a period such as 11 minutes, 37 minutes, some prime or other numbers that do not factor into 60-minute intervals, can increase the number of periods required before a particular pattern repeats. Instead, the alignment of periods may drift through hours, days, weeks, etc. before repeating. The duration of a cycle through each pairing strategy may align infrequently with to the hours of a day, days of a week, weeks of a month or year, etc.

FIG. 3A shows an example of a single non-factor period of 11 minutes and approximately a 73% duty cycle, with the first eight minutes using a first pairing strategy and the last three minutes using a second pairing strategy. FIG. 3B illustrates six consecutive cycles. For example, at the top of the first hour on the first day of the week (e.g., Monday at 9:00 AM), the first period may begin, aligned on the top of the hour, the first hour of the day, and the first day of the week. The first period may last from 9:00-9:11 AM, followed by the second period from 9:11-9:22 AM, and so on, as illustrated in FIG. 3B and Table I below. The sixth period begins at 9:55 and ends at 10:06. The top of the second hour (10:00 AM), occurs during the sixth cycle and is not aligned with the beginning of a period. FIG. 3C shows the same six periods as FIG. 3B, with the horizontal axis marking time on ten-minute intervals to illustrate the intentional intra-hour misalignment further.

TABLE I Period # Time Period Begins 1 9:00 2 9:11 3 9:22 4 9:33 5 9:44 6 9:55 7 10:06 

As shown in FIG. 3D and Table II below, the alignment of periods with respect to the nearest hour continues to drift throughout a day, using an example of a contact center open from 9:00 AM to 5:00 PM (9:00-17:00 hours). The first period of the first hour (9:00 AM) is aligned with the top of the hour (9:00 AM). The first period of the second hour (10:00 AM) begins at 10:06 AM, six minutes after the top of the hour. The first period of the third hour (11:00 AM) begins at 11:01 AM, one minute after the top of the hour. It would take 60 periods over 11 hours for the first period of an hour to once again align with the top of the hour. As shown in Table II, a contact center that is open from 9-5 would not be aligned on the hour again until 12:00 PM the following day (1.375 eight-hour days later).

TABLE II Time of First Hour Period of Hour 1  9:00 2 10:06 3 11:01 4 12:07 5 13:02 6 14:08 7 15:03 8 16:09 (next day) 9  9:04 10 10:10 11 11:05 12 12:00

Table III below shows the sequence of days and times at which a new period begins at the top of the hour. For example, assuming five-day weeks Monday-Friday with eight-hour days from 9-5, the sequence would proceed from aligning on Monday at 9:00 AM, to Tuesday at 12:00 PM, to Wednesday at 3:00 PM (15:00), to Friday at 10:00 AM, and so on. As shown in Table III, it would take 2.2 weeks for a contact center that is open five days per week for eight hours per day to be aligned at the beginning of a day (e.g., Tuesday at 9:00 AM over two weeks later).

TABLE III Next Time Period Day Starts at Top of Hour Monday  9:00 Tuesday 12:00 Wednesday 15:00 Friday 10:00 (next week) Monday 13:00 Tuesday 16:00 Thursday 11:00 Friday 14:00 (next week) Tuesday  9:00

Table IV below shows the sequence of days of the week on which a new period begins at the top of that day of the week. In this example, assuming five-day weeks Monday-Friday with eight-hour days, the sequence would proceed from aligning with the beginning of the day on Monday in week 1, Tuesday in week 3, Wednesday in week 5, and so on. As shown in Table IV, it would take 11 weeks for this contact center to be aligned at the beginning of a Monday again.

TABLE IV Next Day Cycle Starts Week at Top of Day 1 Monday 3 Tuesday 5 Wednesday 7 Thursday 9 Friday 12  Monday

Thus, as FIGS. 3A-3D and Tables I-IV have illustrated, selecting a non-factor period for an hour/day/week/etc. boundary may be effective for enabling the alignment of periods to “drift” through natural time boundaries over weeks/months/years. Because the alignment of periods drifts, it is less likely for a pattern to arise that confounds measuring relative performance of multiple pairing strategies. In some embodiments, selection of a non-factor period may be combined with other techniques for reducing the effect of confounding variables on performance, such as randomizing or otherwise changing the ordering of pairing strategies within each period or a set of periods.

In some embodiments, the contact center may determine which pairing strategy to use based on the time at which a pairing request is made for a contact. For example, assume a contact center is benchmarking BP and FIFO using the example of FIG. 1A (ten-minute periods with a 50% duty cycle, starting with BP in the first half and FIFO in the second half). If the contact center requests a pairing at 9:04 AM, the time of the pairing falls in the first half of a period, so the BP strategy may be used. If the contact center requests a pairing at 9:06 AM, the time of the pairing falls in the second half of the period, so the FIFO strategy may be used.

In other embodiments, the contact center may determine which pairing strategy to use based on the time at which a contact arrives. For example, assume a contact center is benchmarking BP and FIFO as in the preceding example. If the first contact arrives at 9:04 AM, the time of arrival falls in the first half of a period, so the BP strategy may be used for the contact. Even if the first contact must wait in a queue for two minutes, and the pairing is not requested until 9:06 AM, the pairing may still be made using the BP strategy. Moreover, if a second contact arrives at 9:05 AM, while the first contact is still waiting in queue, the second contact may be designated for FIFO pairing. Consequently, at 9:06 AM, contact choice under behavioral pairing may be limited to only the contacts in queue who arrived during the BP portion of the period and, in this example, only the first contact to arrive would be available.

In embodiments for epoch-based benchmarking in which a contact arrives on a boundary between periods, or on a boundary between switching pairing strategies within a period, the system may have predetermined tie-breaking strategies. For example, the boundary may be defined as “at or before” an aforementioned time, or “on or after” an aforementioned time, etc. For example, if a period is defined to be associated with strategy “A” from 9:00-9:08 and strategy B from 9:08-9:10, it may mean that a contact must arrive on or after 9:00 but before 9:08 (e.g., 9:07.99) to be considered within the first part of the period. Alternatively, it may mean that a contact must arrive after 9:00 but at or before 9:08.00 to be considered within the first part of the period.

In some embodiments, inline benchmarking techniques may be used, in which pairing strategies may be selected on a contact-by-contact basis. For example, assume that approximately 50% of contacts arriving at a contact center should be paired using a first pairing method (e.g., FIFO), and the other 50% of contacts should be paired using a second pairing method (e.g., BP).

In some embodiments, each contact may be randomly designated for pairing using one method or the other with a 50% probability. In other embodiments, contacts may be sequentially designated according to a particular period. For example, the first five (or ten, or twenty, etc.) contacts may be designated for a FIFO strategy, and the next five (or ten, or twenty, etc.) may be designated for a BP strategy. Other percentages and proportions may also be used, such as 60% (or 80%, etc.) paired with a BP strategy and the other 40% (or 20%, etc.) paired with a FIFO strategy.

From time to time, a contact may return to a contact center (e.g., call back) multiple times. In particular, some contacts may require multiple “touches” (e.g., multiple interactions with one or more contact center agents) to resolve an issue. In these cases, it may be desirable to ensure that a contact is paired using the same pairing strategy each time the contact returns to the contact center. If the same pairing strategy is used for each touch, then the benchmarking technique will ensure that this single pairing strategy is associated with the final outcome (e.g., resolution) of the multiple contact-agent interactions. In other situations, it may be desirable to switch pairing strategies each time a contact returns to the contact center.

In some embodiments, the determination of whether a repeat contact should be designated for the same (or different) pairing strategy may depend on other factors. For example, there may be a time limit, such that the contact must return to the contact center within a specified time period for prior pairing strategies to be considered (e.g., within an hour, within a day, within a week). In other embodiments, the pairing strategy used in the first interaction may be considered regardless of how much time has passed since the first interaction.

For another example, repeat contact may be limited to specific skill queues or customer needs. Consider a contact who called a contact center and requested to speak to a customer service agent regarding the contact's bill. The contact hangs up and then calls back a few minutes later and requests to speak to a technical support agent regarding the contact's technical difficulties. In this case, the second call may be considered a new issue rather than a second “touch” regarding the billing issue. In this second call, it may be determined that the pairing strategy used in the first call is irrelevant to the second call. In other embodiments, the pairing strategy used in the first call may be considered regardless of why the contact has returned to the contact center.

One approach to considering prior pairing for inline benchmarking techniques is depicted in FIG. 4. FIG. 4 shows a flow diagram of benchmarking method 400 according to embodiments of the present disclosure. Benchmarking method 400 may begin at block 410.

At block 410, an identifier of a contact (e.g., caller) may be identified or otherwise determined. In this example, a caller's “Billing Telephone Number” or “BTN” may be identified. This example assumes that a caller uses the same BTN for each call. In other embodiments, other identifiers of the contact (e.g., a customer identification number, Internet Protocol (IP) address) may be used instead. Having identified the caller's BTN (or other contact identifier), benchmarking method 400 may proceed to block 420.

At block 420, a pseudorandom number generator (PRNG) may be seeded with the BTN (or other contact identifier). Having seeded the PRNG with the BTN, benchmarking method 400 may proceed to block 430.

At block 430, a pseudorandom number may be generated for the contact using the seeded PRNG. Because the seed will be the same for a given contact each time the contact returns to the contact center, the generated pseudorandom number will also be the same each time for the given contact. Having generated the pseudorandom number, benchmarking method 400 may proceed to block 440.

At block 440, a pairing strategy (e.g., BP or FIFO) may be selected for the given contact based on the generated pseudorandom number. For example, if 50% of contacts should be paired using BP, and the other 50% should be paired using FIFO, the PRNG may be configured to generate either a 1 or a 0. If the generated pseudorandom number is a 1, the contact may be designated for BP pairing. If the generated pseudorandom number is 0, the contact may be designated for FIFO pairing.

In this way, the contact will always be paired using the same strategy each time the contact returns to the contact center. The PRNG will be seeded with the same seed (e.g., the contact's BTN) each time, so the PRNG will generate the same pseudorandom number for the contact each time. Thus, benchmarking method 400 may select the same pairing strategy for the contact each time. In this way, it is possible to account for prior pairings without relying on a database or other storage means to determine whether or how a contact has been previously paired. In this way, benchmarking method 400 is stateless with respect to whether or how a contact has been previously paired. Having selected a pairing strategy for the contact, benchmarking method 400 may proceed to block 450.

At block 450, the contact may be paired to an available agent using the selected pairing strategy. When a contact has been paired with an available agent, components of the contact center system (e.g., switches, routers) may connect the contact to the agent. Following (or during) the contact-agent interaction, the agent may create a record of the outcome of the interaction. For example, in a sales queue, the agent may create an order for the contact. In a technical support queue, the agent may create or modify a service ticket. The contact center system may also record information about the interaction, such as the time and duration of a call, the BTN or other identifier of the contact, the agent identifier, and other data. At this point, benchmarking method may proceed to block 460.

At block 460, an identifier of the selected pairing strategy may be associated with the record of the contact-agent interaction created at block 450. In some embodiments, this may happen simultaneously with the creation of the record. For example, when the contact center system records the time and duration of a call, it may also record whether the call had been paired using a BP or FIFO pairing strategy. In other embodiments, another module may create a separate record of the pairing. This module may record the time of the pairing, the contact and agent identifiers, the pairing strategy used (e.g., BP or FIFO), and any other data that may be helpful for later matching the pairing record with the record of the caller-agent interaction outcome. At some later time, the pairing records may be matched with the caller-agent interaction records so that the pairing strategy information may be associated with the outcome in one record or the other (or both). Following block 460, benchmarking method 400 may end. In some embodiments, benchmarking method 400 may return to block 410, waiting for another contact to arrive.

Another approach to considering prior pairing in combination with epoch benchmarking techniques is depicted in FIG. 5. This type of technique may be considered “hybrid inline-epoch benchmarking.” FIG. 5 shows a flow diagram of benchmarking method 500 according to embodiments of the present disclosure. Benchmarking method 500 may begin at block 510.

At block 510, a contact (e.g., “contact n”) arrives at the contact center at a particular time t. Benchmarking method 500 may proceed to block 520.

At block 520, it may be determined whether the contact has been previously paired; i.e., whether this contact is returning to the contact center for a subsequent touch or interaction. This decision may be made using a variety of techniques. For example, the benchmarking system may look up the contact's records using a contact identifier (e.g., BTN or customer ID) in a database to determine whether and when the contact had previously contacted the contact center. Using a suitable technique, the benchmarking system may determine that the contact had been previously paired and, in some embodiments, whether and how the prior pairing should influence the current pairing.

In some embodiments, the benchmarking system may preferably pair a contact using the same pairing strategy every time the contact returns to the contact center. Thus, if contact n was previously paired using pairing strategy “A” (e.g., BP), benchmarking method 500 may proceed to block 560 for subsequent pairing using pairing strategy A again. Similarly, if contact n was previously paired using pairing strategy “B”) (e.g., FIFO), benchmarking method 500 may proceed to block 570 for subsequent pairing using pairing strategy B again.

However, if it is determined at block 520 that contact n has not been previously paired (or, in some embodiments, any prior pairing should not influence the current pairing), benchmarking method 500 may proceed to using epoch benchmarking at block 550.

At block 550, time may be used to determine which pairing strategy to use for contact n. In this example, arrival time t may be used. If contact n arrived during a time period when the benchmarking system is pairing using strategy A, benchmarking method 500 may proceed to to block 560 for subsequent pairing using strategy A. Similarly, if contact n arrived during a time period when the benchmarking system is pairing using strategy B, benchmarking method 500 may proceed to block 570 for subsequent pairing using strategy B.

At blocks 560 and 570, contacts may be paired to available agents using pairing strategies A and B, respectively. In some embodiments, more than two pairing strategies may be used (e.g., prior pairings using A, B, C, etc. or epoch benchmarking within time periods using A, B, C, etc.). Once paired, the contact may be routed or otherwise connected to the available agent within the contact center system. As described above with respect to benchmarking method 400 (FIG. 4), the agent may create a record of the contact-agent interaction, and the contact center system may also create or modify this record. Benchmarking method may proceed to block 580.

At block 580, an identifier to the selected pairing strategy (e.g., A or B) may be associated with the record created at block 560 or 570. As described above with respect to benchmarking method 400, this association may occur simultaneously with the creation of the contact-agent interaction record, or it may be matched at a later time with other records created by a benchmarking module or other module. Following block 580, benchmarking method 500 may end. In some embodiments, benchmarking method 500 may return to block 510, waiting for another contact to arrive.

By associating the pairing strategy with the outcome as in, for example, benchmarking methods 400 and 500, the outcomes associated with each pairing strategy may be measured (e.g., averaged, accumulated), and the relative performance of each pairing strategy may be measured (e.g., the relative overall performance gain attributable to pairing using BP instead of pairing using FIFO). This benchmarking data may be used for a variety of purposes. For example, the data may be used to assess the strength of one pairing module over another. For another example, the data may be used to improve the strength of a BP module by providing “BP on” and “BP off” (e.g., FIFO) contact-agent interaction records to enhance the artificial intelligence in the system. For another example, the data may be used for billing. Because the value added by one pairing strategy over another may be measured accurately and fairly, this benchmarking data may be used in a pay-for-performance business model, in which a client pays a pairing strategy vendor a percentage of the actual measured value added by using the vendor's pairing strategy (e.g., when BP is on as opposed to when BP is off).

Specifically, in some embodiments, associated outcome data may be used to determine an economic value or gain associated with using one pairing strategy instead of another. In some embodiments, the economic value or gain may be used to determine compensation for a vendor or other service provider providing a module or modules for the higher-performing pairing strategy creating the economic value. For example, if a contact center benchmarks BP against FIFO and determines that, for a given time period (e.g., a day, a week, a month, etc.), that BP performed 5% better than FIFO on average over the time period, the BP vendor may receive compensation corresponding to the 5% value added by BP (e.g., a percentage of the 5% additional sales revenue, or a percentage of the 5% additional cost savings, etc.). Under such a business model, a contact center owner may forgo capital expenditure or vendor fees, only paying a vendor for periods of time in which the vendor demonstrates value added to the contact center's performance.

FIG. 6 shows a block diagram of a contact center system 600 according to embodiments of the present disclosure. The description herein describes network elements, computers, and/or components of a system and method for simulating contact center systems that may include one or more modules. As used herein, the term “module” may be understood to refer to computing software, firmware, hardware, and/or various combinations thereof. Modules, however, are not to be interpreted as software which is not implemented on hardware, firmware, or recorded on a processor readable recordable storage medium (i.e., modules are not software per se). It is noted that the modules are exemplary. The modules may be combined, integrated, separated, and/or duplicated to support various applications. Also, a function described herein as being performed at a particular module may be performed at one or more other modules and/or by one or more other devices instead of or in addition to the function performed at the particular module. Further, the modules may be implemented across multiple devices and/or other components local or remote to one another. Additionally, the modules may be moved from one device and added to another device, and/or may be included in both devices.

As shown in FIG. 6, the contact center system 600 may include a central switch 610. The central switch 610 may receive incoming contacts (e.g., callers) or support outbound connections to contacts via a telecommunications network (not shown). The central switch 610 may include contact routing hardware and software for helping to route contacts among one or more contact centers, or to one or more PBX/ACDs or other queuing or switching components within a contact center.

The central switch 610 may not be necessary if there is only one contact center, or if there is only one PBX/ACD routing component, in the contact center system 600. If more than one contact center is part of the contact center system 600, each contact center may include at least one contact center switch (e.g., contact center switches 620A and 620B). The contact center switches 620A and 620B may be communicatively coupled to the central switch 610.

Each contact center switch for each contact center may be communicatively coupled to a plurality (or “pool”) of agents. Each contact center switch may support a certain number of agents (or “seats”) to be logged in at one time. At any given time, a logged-in agent may be available and waiting to be connected to a contact, or the logged-in agent may be unavailable for any of a number of reasons, such as being connected to another contact, performing certain post-call functions such as logging information about the call, or taking a break.

In the example of FIG. 6, the central switch 610 routes contacts to one of two contact centers via contact center switch 620A and contact center switch 620B, respectively. Each of the contact center switches 620A and 620B are shown with two agents each. Agents 630A and 630B may be logged into contact center switch 620A, and agents 630C and 630D may be logged into contact center switch 620B.

The contact center system 600 may also be communicatively coupled to an integrated service from, for example, a third party vendor. In the example of FIG. 6, benchmarking module 640 may be communicatively coupled to one or more switches in the switch system of the contact center system 600, such as central switch 610, contact center switch 620A, or contact center switch 620B. In some embodiments, switches of the contact center system 600 may be communicatively coupled to multiple benchmarking modules. In some embodiments, benchmarking module 640 may be embedded within a component of a contact center system (e.g., embedded in or otherwise integrated with a switch). The benchmarking module 640 may receive information from a switch (e.g., contact center switch 620A) about agents logged into the switch (e.g., agents 630A and 630B) and about incoming contacts via another switch (e.g., central switch 610) or, in some embodiments, from a network (e.g., the Internet or a telecommunications network) (not shown).

A contact center may include multiple pairing modules (e.g., a BP module and a FIFO module) (not shown), and one or more pairing modules may be provided by one or more different vendors. In some embodiments, one or more pairing modules may be components of benchmarking module 640 or one or more switches such as central switch 610 or contact center switches 620A and 620B. In some embodiments, a benchmarking module may determine which pairing module may handle pairing for a particular contact. For example, the benchmarking module may alternate between enabling pairing via the BP module and enabling pairing with the FIFO module. In other embodiments, one pairing module (e.g., the BP module) may be configured to emulate other pairing strategies. For example, a benchmarking module, or a benchmarking component integrated with BP components in the BP module, may determine whether the BP module may use BP pairing or emulated FIFO pairing for a particular contact. In this case, “BP on” may refer to times when the BP module is applying the BP pairing strategy, and “BP off” may refer to other times when the BP module is applying a different pairing strategy (e.g., FIFO).

In some embodiments, regardless of whether pairing strategies are handled by separate modules, or if some pairing strategies are emulated within a single pairing module, the single pairing module may be configured to monitor and store information about pairings made under any or all pairing strategies. For example, a BP module may observe and record data about FIFO pairings made by a FIFO module, or the BP module may observe and record data about emulated FIFO pairings made by a BP module operating in FIFO emulation mode.

Embodiments of the present disclosure are not limited to benchmarking only two pairing strategies. Instead, benchmarking may be performed for two or more pairing strategies. FIGS. 7A and 7B depict examples of benchmarking systems for three pairing strategies (e.g., benchmarking FIFO, PBR, and BP).

FIG. 7A shows a schematic representation of benchmarking sequence according to embodiments of the present disclosure. In this epoch benchmarking example, a period is 15 units of time, and each pairing strategy is used for one-third of the time (5 units). FIG. 7A shows two complete periods, cycling among pairing strategies “2”, “1”, and “0” twice over 30 units of time. For example, from 9:00-9:10 AM, FIFO may be used; from 9:10-9:20 AM, PBR may be used; and from 9:20-9:30 AM, BP may be used. This pattern of FIFO-PBR-BP repeats in the second period.

FIG. 7B shows a schematic representation of benchmarking sequence according to embodiments of the present disclosure. In this epoch benchmarking example, a complete period is 30 time units. A preferred pairing strategy “2” (e.g., BP) is used two-thirds of the time, and other pairing strategies “1” and “0” (e.g., FIFO and PBR) are used one-sixth of the time each. In this example, each time strategy “2” turns off, pairing strategies “1” and “0” alternately turn on. For example, the pattern may be BP-FIFO-BP-PBR. In addition to the examples of FIGS. 7A and 7B, many other patterns for switching among multiple pairing strategies are possible.

In some embodiments, contact center management or other users may prefer a “stabilization period” or other neutral zone. For example, consider a contact center benchmarking BP and FIFO pairing strategies. When the system transitions from BP to FIFO (or vice versa), contact center management may be concerned that the effects of one pairing strategy may somehow influence the performance of another pairing strategy. To alleviate these concerns about fairness, a stabilization period may be added.

One technique for implementing a stabilization period may be to exclude contact-agent interaction outcomes for the first portion of contacts after switching pairing strategies. For example, assume a contact center is benchmarking BP and FIFO with a 50% duty cycle over 30-minute periods. In the aforementioned embodiments (e.g., FIGS. 1A and 1B), BP would be on for 15 minutes, followed by FIFO for 15 minutes, and all of the contact-agent interactions in the 30-minute period would be included in the benchmarking measurement. With a stabilization period, BP would be on for, e.g., 10 minutes. After 10 minutes, the system would switch to FIFO. However, the first, e.g., 10 minutes would be considered a stabilization period, and FIFO pairings made during this period would be excluded from the benchmark. The last 10 minutes of the period would continue pairing using FIFO, and these FIFO pairings would be included in the benchmark.

This pattern is illustrated in FIG. 7A. In this example, instead of depicting switching among three pairing strategies “2”, “1”, and “0”, the “1” may represent the stabilization period. Pairing strategy “2” (e.g., BP) may be on for the first five time units. After five time units, BP may be switched off, and the other pairing strategy (e.g., FIFO) may be used for the remaining ten time units. The next five units (“1”) may be excluded as being part of the stabilization period, and the five time units after that (“0”) may be included as being part of the FIFO benchmarking period.

In some embodiments, the stabilization period may be longer or shorter. In some embodiments, a stabilization period may be used in a FIFO-to-BP transition instead of, or in addition to, a BP-to-FIFO transition (or any transition between two different pairing strategies).

At this point it should be noted that behavioral pairing in a contact center system in accordance with the present disclosure as described above may involve the processing of input data and the generation of output data to some extent. This input data processing and output data generation may be implemented in hardware or software. For example, specific electronic components may be employed in a behavioral pairing module or similar or related circuitry for implementing the functions associated with behavioral pairing in a contact center system in accordance with the present disclosure as described above. Alternatively, one or more processors operating in accordance with instructions may implement the functions associated with behavioral pairing in a contact center system in accordance with the present disclosure as described above. If such is the case, it is within the scope of the present disclosure that such instructions may be stored on one or more non-transitory processor readable storage media (e.g., a magnetic disk or other storage medium), or transmitted to one or more processors via one or more signals embodied in one or more carrier waves.

The present disclosure is not to be limited in scope by the specific embodiments described herein. Indeed, other various embodiments of and modifications to the present disclosure, in addition to those described herein, will be apparent to those of ordinary skill in the art from the foregoing description and accompanying drawings. Thus, such other embodiments and modifications are intended to fall within the scope of the present disclosure. Further, although the present disclosure has been described herein in the context of at least one particular implementation in at least one particular environment for at least one particular purpose, those of ordinary skill in the art will recognize that its usefulness is not limited thereto and that the present disclosure may be beneficially implemented in any number of environments for any number of purposes. Accordingly, the claims set forth below should be construed in view of the full breadth and spirit of the present disclosure as described herein. 

The invention claimed is:
 1. A method for benchmarking in a contact center system comprising: determining, by at least one computer processor communicatively coupled to and configured to operate in the contact center system, an identifier for each contact of a plurality of contacts; for each contact, selecting, by the at least one computer processor, one of a first pairing strategy or a second pairing strategy based on the identifier, wherein the selecting comprises mapping, by the at least one computer processor, the identifier to the first pairing strategy according to a first predetermined frequency or the second pairing strategy according to a second predetermined frequency; pairing, by the at least one computer processor, each contact to an agent for connection in the contact center system using the selected one of the first or second pairing strategy; determining, by the at least one computer processor, a difference in performance between the first pairing strategy selected for pairing a first subset of the plurality of contacts and the second pairing strategy selected for pairing a second subset of the plurality of contacts, wherein the difference in performance provides an indication that pairing contacts and agents using the first pairing strategy results in a performance gain for the contact center system attributable to the first pairing strategy; and outputting, by the at least one computer processor, the difference in performance between the first and second pairing strategies for benchmarking the first and second pairing strategies.
 2. The method of claim 1, wherein the identifier is based on a telephone number of the contact.
 3. The method of claim 1, further comprising: searching, by the at least one computer processor, a plurality of historical contact-agent interaction records for a record of a prior pairing, wherein the record of the prior pairing includes an indicator of a previously selected one of the first or second pairing strategy used for the prior pairing.
 4. The method of claim 1, wherein selecting based on the identifier further comprises: seeding, by the at least one computer processor, a pseudorandom number generator using the identifier.
 5. The method of claim 1, wherein the identifier is fixed for the contact, and wherein the first pairing strategy is repeatedly selected each time the contact arrives at the contact center based on the fixed unique identifier.
 6. The method of claim 1, further comprising: associating, by the at least one computer processor, an indicator of the selected one of the first or second pairing strategy with a record of an interaction between the contact and the agent paired to the contact.
 7. The method of claim 1, wherein the identifier for each contact is a unique identifier for each contact.
 8. The method of claim 1, wherein the identifier for each contact is at least a portion of a telephone number of each contact.
 9. A system for benchmarking in a contact center system comprising: at least one computer processor communicatively coupled to and configured to operate in the contact center system, wherein the at least one computer processor is configured to: determine an identifier for each contact of a plurality of contacts; for each contact, select one of a first pairing strategy or a second pairing strategy based on the identifier, wherein the selecting comprises mapping the identifier to the first pairing strategy according to a first predetermined frequency or the second pairing strategy according to a second predetermined frequency; pair each contact to an agent for connection in the contact center system using the selected one of the first or second pairing strategy; determine a difference in performance between the first pairing strategy selected for pairing a first subset of the plurality of contacts and the second pairing strategy selected for pairing a second subset of the plurality of contacts, wherein the difference in performance provides an indication that pairing contacts and agents using the first pairing strategy results in a performance gain for the contact center system attributable to the first pairing strategy; and output the difference in performance between the first and second pairing strategies for benchmarking the first and second pairing strategies.
 10. The system of claim 9, wherein the identifier is based on a telephone number of the contact.
 11. The system of claim 9, wherein the at least one computer processor is further configured to: search a plurality of historical contact-agent interaction records for a record of a prior pairing, wherein the record of the prior pairing includes an indicator of a previously selected one of the first or second pairing strategy used for the prior pairing.
 12. The system of claim 9, wherein the at least one computer processor is further configured to: seed a pseudorandom number generator using the identifier.
 13. The system of claim 9, wherein the identifier is fixed for the contact, and wherein the first pairing strategy is repeatedly selected each time the contact arrives at the contact center based on the fixed identifier.
 14. The system of claim 9, wherein the at least one computer processor is further configured to: associate an indicator of the selected one of the first or second pairing strategy with a record of an interaction between the contact and the agent paired to the contact.
 15. The system of claim 9, wherein the identifier for each contact is a unique identifier for each contact.
 16. The system of claim 9, wherein the identifier for each contact is at least a portion of a telephone number of each contact.
 17. An article of manufacture for benchmarking in a contact center system in a contact center system comprising: a non-transitory processor readable medium; and instructions stored on the medium; wherein the instructions are configured to be readable from the medium by at least one computer processor communicatively coupled to and configured to operate in the contact center system and thereby cause the at least one computer processor to operate so as to: determine an identifier for each contact of a plurality of contacts; for each contact, select one of a first pairing strategy or a second pairing strategy based on the identifier, wherein the selecting comprises mapping the identifier to the first pairing strategy according to a first predetermined frequency or the second pairing strategy according to a second predetermined frequency; pair each contact to an agent for connection in the contact center system using the selected one of the first or second pairing strategy; determine a difference in performance between the first pairing strategy selected for pairing a first subset of the plurality of contacts and the second pairing strategy selected for pairing a second subset of the plurality of contacts, wherein the difference in performance provides an indication that pairing contacts and agents using the first pairing strategy results in a performance gain for the contact center system attributable to the first pairing strategy; and output the difference in performance between the first and second pairing strategies for benchmarking the first and second pairing strategies.
 18. The article of manufacture of claim 17, wherein the identifier is based on a telephone number of the contact.
 19. The article of manufacture of claim 17, wherein the instructions further cause the at least one computer processor to operate so as to: search a plurality of historical contact-agent interaction records for a record of a prior pairing, wherein the record of the prior pairing includes an indicator of a previously selected one of the first or second pairing strategy used for the prior pairing.
 20. The article of manufacture of claim 17, wherein the instructions further cause the at least one computer processor to operate so as to: seed a pseudorandom number generator using the identifier.
 21. The article of manufacture of claim 17, wherein the identifier is fixed for the contact, and wherein the first pairing strategy is repeatedly selected each time the contact arrives at the contact center based on the fixed identifier.
 22. The article of manufacture of claim 17, wherein the identifier for each contact is a unique identifier for each contact.
 23. The article of manufacture of claim 17, wherein the identifier for each contact is at least a portion of a telephone number of each contact. 